The theory would be endosymbiont theory. It was developed on the idea that some eukaryotic organelles come from prokaryotic organisms. It is also known as symbiogenesis. This theory says that these organelles were first from prokaryotic cells that is living inside a host cell.
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The answer is D) denser plates slide under lighter plates
Answer:
Explanation:
Biconvex lens: Distinguised by two spherical (convex) surfaces. ...
Aspheric Lens: Aspheric curves allow higher magnification with less distortion. ...
Aplanatic Lens: Consists of two equally strong plano-convex lenses. ...
Achromatic Lens: Top quality lens.
A stem-cell niche is an area of a tissue that provides a specific micro-environment, in which stem cells are present in an undifferentiated and self-renewable state.
